code: def read_lookup_table_file(lookup_table_file: Text) -> List[Text]:
      """Read the lookup table file.
  
      Args:
          lookup_table_file: the file path to the lookup table
  
      Returns:
          Elements listed in the lookup table file.
      """
      try:
          f = open(
              lookup_table_file,
              "r",
              encoding=rasa.shared.utils.io.DEFAULT_ENCODING,
          )
      except OSError:
          raise ValueError(
              f"Could not load lookup table {lookup_table_file}. "
              f"Please make sure you've provided the correct path."
          )
  
      elements_to_regex = []
      with f:
          for line in f:
              new_element = line.strip()
              if new_element:
                  elements_to_regex.append(new_element)
      return elements_to_regex
  
file_path: rasa/rasa/nlu/utils/pattern_utils.py
imports: import re
  from typing import Dict, List, Text, Union
  import rasa.shared.utils.io
  from rasa.shared.nlu.training_data.training_data import TrainingData
  from rasa.shared.exceptions import InvalidConfigException
label_desc: Use image node_id 3 for calling a global function with example usage: read_lookup_table_file(lookup_table_file) and returns: elements_to_regex